The Senate Majority PAC ad is running statewide with a buy size of nearly $270,000, according to a spokesman. It plays up the label national Democrats are attaching to McConnell in an effort to defeat him next year: “guardian of gridlock.”

The goal is for voters to see McConnell as someone solely focused on obstructing government, rather than on his home state.

“He calls himself the guardian of gridlock, grinding the Senate to a halt, even when it hurts Kentucky,” the ad’s announcer says.

Kentucky Secretary of State Alison Lundergan Grimes announced earlier this month that she will challenge McConnell, and the Democrat will formally kick off her campaign on July 30. Kentucky remains a Republican state, but Democrats believe there is a path to victory.

Last week, a Republican super PAC, Kentuckians for Strong Leadership, launched its second ad against Grimes. Meanwhile, McConnell is likely to get a primary challenger on Wednesday, when wealthy businessman Matt Bevin announces his intentions, the Louisville Courier-Journal reported on Monday.